The big thing about the island is the history. We have almost 400 years of recorded history," said realtor Nick Leterdre.

Captain John Smith -- yeah, that one -- is believed to have visited the island in 1607, making him one of the island's earliest visitors, according to WTOP. Alexander Graham Bell was also a frequent visitor to the island in the 1800s, and the Mount Vernon Hunting Club, along with President Theodore Roosevelt's son, would hunt ducks on the island and bring them back to the White House for dinner.

The most recent inhabitant of the island was Dr. William Fry. Leterdre said Fry renovated many of the island's structures and even hand-dug a swimming pool in front of the island's main home.